12 results about "Fixed prosthesis" patented technology

The invention discloses an adjustable calibration device and calibration method for assisting tooth preparation, the device comprises a calibration tray, the calibration tray is provided with a common in-place track calibration table, the calibration table is arranged on the calibration tray and can slide along the common in-place track, and the calibration table is also provided with a plurality of calibration tracks; and the calibration rod assembly comprises a fixed rod and a calibration rod which are connected with each other, and the fixed rod is vertically connected to the calibration track. The adjustable calibration device for assisting tooth preparation is simple in structure, easy to manufacture, relatively low in cost and easy to use, and can realize accurate detection of tooth preparation amount through the synergistic effect of the calibration table and the calibration rod assembly, so that insufficient preparation or excessive preparation is avoided; the shaft wall parallelism of multi-tooth preparation can be verified at the same time through combined application of a plurality of calibration tables, the consistency of in-position paths of prostheses is ensured, and the calibration table is suitable for the preparation process of fixed prostheses such as full crown, veneering and inlay restoration and can be well applied to oral medicine and biomedical engineering industries.

The invention relates to a 3D printing femoral intramedullary and extramedullary biological matching composite fixing prosthesis and an installation method, the 3D printing femoral intramedullary and extramedullary biological matching composite fixing prosthesis comprises a fixing prosthesis body and a far-end prosthesis body, the fixing prosthesis body is formed by an intramedullary fixing component, an extramedullary fixing component and a connecting component in an integrated 3D printing mode, and the intramedullary fixing component is used for being inserted into a femoral medullary cavity of a patient; the extramedullary fixing component is provided with two supporting wing plates which are symmetrically distributed and attached to the surfaces of cortical bones on the two sides of a femur and used for forming biological fixation with the femur, and the connecting component is arranged between the intramedullary fixing component and the extramedullary fixing component and mechanically connects the intramedullary fixing component and the extramedullary fixing component into a whole to form a composite bearing structure crossing the inside and the outside of a medullary cavity. Technical innovations such as arc-shaped medullary rod anatomy adaptation, a double-side clamping wing plate structure, integrated 3D printing connection, a composite fixing mechanism and a simplified mounting mode are fused, and a prosthesis system with stability, long-term firmness, rebuilding feasibility and operation convenience is constructed.

The invention particularly relates to a three-dimensional reconstruction method and system for manufacturing a fixed restoration, and the method comprises the steps: obtaining an oral environment parameter set of a user, the oral environment parameter set at least comprises occlusal force distribution, temperature condition, bacteria attachment amount, bacteria attachment position distribution and use habits; substituting the oral environment parameter set of the user into a digital model generation module to construct an oral environment digital model; obtaining initial prosthesis parameters; substituting the initial restoration parameters and the oral environment digital model into a restoration three-dimensional optimization module to generate restoration optimization parameters and an optimized three-dimensional model of the restoration; and manufacturing the fixed prosthesis according to the prosthesis optimization parameters. According to the method, full-periodical performance prediction of the prosthesis and automatic optimization of the prosthesis are realized, the design efficiency of the prosthesis and the precision of a three-dimensional reconstruction model are improved, and intelligence and precision of a three-dimensional reconstruction technology in the manufacturing process of the prosthesis are realized.

This invention discloses an additive manufacturing method for full-mouth implant-supported fixed prostheses, belonging to the field of structural engineering technology. Addressing the complex geometric features of full-mouth implant-supported fixed prostheses, this invention utilizes a GPU-accelerated multi-objective optimization algorithm to optimize the placement angle, achieving minimal or no support in key areas such as the abutment interface. Simultaneously, it designs a truncated cubic lattice-column composite support structure, combined with targeted support designs for overhanging areas and edges, solving the problems of redundant support and insufficient molding accuracy in traditional methods. This significantly improves additive manufacturing accuracy and meets clinical needs.

System for diagnosis, planning and guided execution of dental preparations in fixed prostheses, comprising a computer system, with respective hardware and software components, as well as further dedicated peripherals, which implements a process characterized by the following steps: A) preliminary diagnosis of the elements to be submitted to a prosthetic process : A.l) evaluate the dental element(s) and related prosthetic process, A.2) evaluate the bone support, including ratio of intraosseous and extraosseous dental portion, and distance and divergence between teeth to be connected, and A.3) evaluate the internal structure, e.g. enamel, dentin, pulp, cement, material for reconstruction; B) planning of ideal dental preparation(s) : B.l) superimpose an ideal prosthetic project to an initial anatomical dental situation; B.2) define a final subgingival / juxtagingival / supragingival preparation; and B.3) starting from an ideal tooth volume, reduce the volume so as to simulate the ideal dental preparation, taking into due consideration: B.3.1) the extent of the reduction depending on the material that will be used to construct the crown, e.g. metal-ceramic, zirconia, zirconia-ceramic, composite, disilicate lithium, ceramic, B.3.2) insertion axis of the prosthesis, where multiple dental elements should be parallelized in order to have a common insertion axis, and B.3.3) inclination of the prosthesis walls, which could be more or less retentive from a mechanical point of view; C) diagnosis of the ideal dental preparation(s) generated: C.l) evaluate the proximity to the pulp in the dental vital elements, including the need of root canal therapy related to vital dental elements, C.2) evaluate the structural surface composition of an ideal abutment, including percentage of enamel / dentin / reconstruction material, in order to assess retention adhesive of the substrate, C.3) evaluate, starting from the final preparation, the quantity of healthy dental tissue in terms of height - splint / cerclage effect, in order to define the mechanical stability of the preparation; D) transfer the ideal dental preparation into the oral cavity of a real patient according to two possible options: a) develop a tooth-supported transfer mask with guide tracks for dedicated drills with

The utility model discloses a customized detachable edentulous immediate load-bearing fixed denture, and relates to the technical field of human oral medicines.The fixed denture comprises a plurality of customized implants, retention connectors, corresponding repair bases and repair base inner screws, the lower ends of the customized implants are implanted into alveolar bones, the upper ends of the customized implants are flush with gingiva, and the lower ends of the customized implants are connected with the retention connectors. The retention connector is of a strip-shaped structure, is horizontally laid above the customized implants along the tooth jaw shape and is used for connecting the implants at the planting points into a whole, the repair abutment is arranged above the retention connector, and the repair abutment inner screw is used for penetrating through the retention connector to connect the repair abutment with the customized implants; according to the technical scheme, the implant tooth is suitable for patients with full-mouth or half-mouth tooth loss and free-end tooth loss, immediate implantation, immediate repair and immediate load bearing can be achieved, the repair period is shortened, the difficulty of implantation operation and the risk of repair failure are reduced, and the indications of full-mouth or free-end tooth loss of the implant tooth are expanded.

The invention discloses an accuracy detection system for passive in-position of a dentition implantation support type fixed restoration, and relates to the technical field of biomedical engineering. The system comprises a three-dimensional data modeling module used for acquiring three-dimensional data of a target prosthesis and constructing a prosthesis virtual in-place model; the in-place process simulation module is used for simulating restoration in-place, calculating biomechanical stress distribution and microscopic gap distribution and extracting a stress concentration coefficient and a gap uniformity index; the comprehensive evaluation and analysis module is used for carrying out passive in-place accuracy comprehensive evaluation according to the stress concentration coefficient and the gap uniformity index in combination with the restoration material attribute and the implant-bone interface combination characteristic to obtain multi-dimensional accuracy evaluation parameters; and the result decision output module is used for judging whether the passive in-place state is qualified or not based on a comparison result of the multi-dimensional accuracy evaluation parameter and a preset passive in-place threshold set, and generating a detection report and an adjustment strategy. According to the invention, the accuracy of passive in-place detection is effectively improved.

An implanted prosthesis for orthopedic and dentistry surgeries having a short body implant and an internal channel having an arborization system of orifices for delivery the necessary osteo-forming substances is disclosed. The implanted prosthesis can be created by additive manufacturing and includes a short body portion having a helicoid on the exterior wall, a collar, a neck, which are all aligned on the longitudinal axis of the prosthesis. The prosthesis neck has a hexagonal orifice for the insertion of dynamometric screwdriver to fix prosthesis in place. The hexagonal orifice communicates inside the body with a cylindrical orifice of variable length and diameter, which further communicates with the arborization system of orifices that provide lateral feed with cement and osteo-forming substances, and anchoring. In the middle of the central chamber there is a small threaded area in which a syringe to introduce cement or a threaded cap can be screwed.

The application provides a unilateral or bilateral lumbar spine shock-absorbing zygapophyseal prosthesis, which comprises one or a pair of prosthesis devices arranged in the same structure and opposite directions, and the prosthesis device comprises an upper fixing component, a lower fixing component, a ball-and-socket joint device and a shock-absorbing device; wherein the upper fixing component is fixed to the oblique upper side of the ball-and-socket joint device, the bottom of the ball-and-socket joint device is connected to the shock-absorbing device, and the lower fixing component is fixed to one side of the shock-absorbing device. The application can selectively fix the prosthesis device on one side or two sides according to the actual situation of the patient. In summary, the application has small volume, low destructiveness, high flexibility and shock-absorbing property due to the ball-and-socket joint device and the shock-absorbing device, and the integrated structure simplifies the operation steps in the operation, and only needs to be fixed by screws, so that the operation is good.

A surgical system for joint procedures includes a distractor device with two pivotable arms and two distracting members, along with two attachable tools—one designed to hold or position a prosthetic device and interface with a bone surface, and the other to interface with the opposing bone surface and allow passage of the prosthetic device. The distractor device adjusts the arms to move closer together or farther apart, modifying the space between bone surfaces. The first tool securely engages a prosthetic device or interfaces with a bone. The second tool fits the opposing bone and includes an opening for the prosthetic device to pass through. This system facilitates controlled joint distraction and precise insertion and alignment of a prosthetic device, such as a stemmed tibial implant, during orthopedic surgery. The system is beneficial for procedures like total ankle replacement, enhancing surgical access and outcomes by supporting accurate placement of implants.

A delivery apparatus includes a dock sleeve having a body portion and a tip portion connected to a distal end of the body portion. The body portion is configured to retain a docking device for a prosthetic implant. The tip portion includes a wall and at least one slit cutting through a thickness of the wall. The tip portion has a cylindrical shape when no compressive load is applied to a distal end of the tip portion. The at least one slit causes the tip portion to move from the cylindrical shape to a deformed shape when pressing the distal end of the tip portion against an external object such that the distal end of the tip portion deflects from the external object.

This invention discloses a method for assessing the fit of fixed prostheses based on image data, comprising the following steps: acquiring continuous temporal images of a patient simulating occlusion after implantation of the fixed prosthesis and static reference images of a non-occlusal state; separating the fixed prosthesis region and the abutment region and locking the internal mating surfaces of the inner wall of the fixed prosthesis and the outer wall of the abutment, as well as the edge mating surfaces of the bottom edge of the fixed prosthesis and the abutment; using an optical flow algorithm to calculate the pixel displacement vectors of the internal mating surfaces and edge mating surfaces of the corresponding consecutive frames in the continuous temporal images to obtain a preliminary micro-displacement field; using the internal mating surfaces and edge mating surfaces of the static reference images as a reference, correcting the preliminary micro-displacement field to obtain a relative micro-displacement field; processing the relative micro-displacement field by a temporal anomaly detection model and outputting a fit score. This invention, by introducing a dynamic occlusion scenario and correcting through a static non-occlusal scenario, can accurately reflect the true fit of the fixed prosthesis.